DE3330712A1 - DEVICE FOR REGULATING THE FUEL FLOW - Google Patents

Description

The invention relates to safety devices for Regulating the fuel flow rate for closed combustion engines, so that the machine is protected against damage due to insufficient oil pressure in the lubricating oil system is protected.

There are already several protective devices for machines known that the pressure when there is insufficient lubricating oil Stop or largely stop the flow of fuel to the machine throttle.

The device according to US Pat. No. 3,202,143 relates to a valve which completely prevents the flow of fuel and which a. automatic shutdown of the motor causes if the oil pressure has dropped below a predetermined value or if the engine is overheating. This device contains also a manually operated bypass which, when used, enables a sufficient amount of fuel reaches the machine so that it works with maximum power and speed, even if the oil pressure is below a normal mark has fallen or if the machine has • overheated, with the result of a possible Damage to the machine.

U.S. Patent 3,523,521 describes a safety device for machines that respond to insufficient oil pressure. The device has means to change the oil pressure value, in which the fuel valve is closed, taking into account the different fuel pressures, that supply the machine.

U.S. Patent 3,590,798 also describes a safety device for machines that respond to low oil pressure and coolant temperatures. In contrast to the above However, this device represents both patents does not represent a complete fuel shut-off, which results in a complete shutdown of the machine is effected. For this »

· - COPY

3 "

"33ϋ712

keeps it an automatic., throttling the engine or torque reducing valve by means of a built-in fuel bypass, which the machine continues supplied with a separate amount of fuel after the main fuel valve is closed. It contains also a manually operated bypass that allows the engine to continue running at maximum when in use Force and speed allowed, as in the case of the above U.S. Patent 3,202,143.

The US-PS 4,117,822 describes a safety device, which causes the engine to shut down completely if the oil pressure reaches an unnatural order of magnitude. A manually operated bypass is provided, whereby the Machine supplied with a limited amount of fuel that is only sufficient to drive the machine with reduced power and speed.

Although these earlier devices were extremely helpful in preventing various types of machine damage, however, they contained many undesirable disadvantages.

A disadvantage of prior devices is that the machine owner cannot determine whether the machine operator has bypassed the fuel cut-off valve. In particular, prior devices lack a means by which the machine owner can determine whether the user has bypassed the fuel cut. With these earlier devices, the user can run the machine for a long time after switching on the bypass, which results in serious machine damage. After such a '; expensive equipment damage occurred may · simply turn back the bypass control knob to the normal position "and deny having switched to bypass a responsible '· wortungsloser users. Due to the high temperature cost of these machines want the machine owners a bypass misuse by the user for a motor

keep shutdown as low as possible.

Another problem with the earlier devices is the need to gain access to the machine to the safety shutdown of the fuel flow for Bridge machine. With some machines it is necessary to switch on the bypass for starting purposes, because the fuel flow from the fuel valve is insufficient, Let the engine run long enough to build up sufficient oil pressure to open the fuel valve. It is extremely difficult to access the machine to turn on the bypass for start-up purposes to obtain.

Another disadvantage of the earlier devices is that they cannot easily and safely change from a torque reducing device (with a lack of oil pressure causing a limited fuel flow rate) to one Fuel shut-off device (where lack of oil pressure is a complete fuel shut-off caused). Although the above-mentioned US-PS 3,590,798 contains a device that a change from a torque reduction to a enables complete shut-off, this is achieved simply by the fact that an outer adjusting spindle 106 is attached. As a result, the user of the machine can use such an adjusting spindle to Machine owner to bypass that the device for complete barrier is used.

Although the aforementioned US-PS4 .117.822 a protective device for machines with a limited lockup, this requires limited lockup device, which essentially differ from the handle 50 and disk 43 of such patents as USPS 3,202,143 and 3,590,798. It is extremely helpful in providing a device in which a handle and a disk as in USPS 3,202,143 and 3,590.79'8

regulates the use of the limited bypass.

The US patent application on which the present application is based 296.193 describes a system which solves or reduces these problems. The one in this However, external bypass devices described in the original patent application have some disadvantages.

In the original application, an electrical bypass system is described which can easily be used for such machines that start with the help of a battery or electrically. However, there are a large number of machines for which the electrical bypass system is not particularly suitable.
15th

The alternative pneumatic bypass according to the original application is very helpful for many applications. However, it is not always desirable or possible to use a pressure source to apply pressure.

If the protection system for the engine is built into a vehicle with air brakes, the compressed air can be used the braking system "tap". It goes without saying that this tapping of the same compressed air for the device of the machine protection valve as it is for the Braking is used must be done very carefully. Leaks in the system can make the vehicle brakes ineffective be let.

An air compressor driven by the machine can be used as the compressed air source, however the machine is usually always switched off immediately for a longer period of time. The machine-operated air compressor and lose the air lines or air tanks then their pressure. In addition, to avoid condensation, the user can hand air out of the

Cables. In those machines where the external bypass has to be switched on at the beginning in order to close it start, if the air generated by the machine is too low, a pressure that is too low would prevent the machine from starting. When using a pressure source that is not connected to the braking system or generated by the engine these disadvantages can be avoided with a pneumatic bypass. In doing so, however, the difficulties would arise

and the cost of the system increases significantly. IO

The object of the present invention is to provide a new and improved security system for Machinery.

Another object of the present invention is to provide an external, non-electrically operated, simple and reliable bypass function for a fuel to obtain shut-off device.

Furthermore, a safety device for an engine is to be created in which, when there is no oil pressure, either optionally a machine shutdown or a limitation the torque is effected.

Furthermore, the present invention is intended to create a fuel-limiting, manually operable bypass The same piston rod, which serves as the regulator of the main valve, is also regulated via an arrangement can, which consists of a handle and a washer, so that a manual diversion of the limited fuel is avoided.

Figure 1 is a top plan view of portions of the present invention

Invention.
5

Figure 2 is a view of portions of the present invention.

Fig. 3 is an illustration of the present invention, ge. sectioned along line 3-3 of Fig. 2 showing the main valve in the closed position.

Fig. 4 is a partially broken away partial view of the invention on the same plane as Fig. 3 and shows this Main valve in the open position.

Figure 5 is an exploded side view of the parts of the eccentric disc of the present invention.

Fig. 6 is an exploded view of various parts of the main valve of the present invention.

Fig. 7 is an enlarged sectional view of one end of the main portion 1 of the present invention.

Fig. 8 is a partially broken away side view of parts of the present invention and showing the external bypass configuration and pneumatic as well the electrical devices of an externally operated valve.

Figure 9 is a sectional view of an improved one external bypass arrangement.

Fig. 10 is an exploded view of the exterior Bypasses of Fig. 9.

11 and 12 are enlarged partial views for Illustration of the mechanism of engagement with the outside lying bypass of FIG. 9.

Fig. 1 shows a top view of the present invention. The fuselage 10 is substantially cylindrical and has one end has an operating lever 12 which has a shaft 16 and a limiting pin 14 attached to it turns. To indicate whether the manually operated bypass is in a bypass or in a flow position, According to the marking 220 or 22 R, the limiting pin 14 also acts with the stop pin 18 together in order to prevent the operating lever 12 and the shaft 16 connected thereto from a greater angular rotation than to 180 °, as described in more detail in patent 3,207,143 is described. The lever 12 attached outside the fuselage 10 has the function of a bypass adjusting element.

An external bypass cap 3OC, which will be discussed in detail later in the explanation of FIG. 5, is also shown in FIG.

Fig. 2 is a rear view of the fuselage 10, the operating lever 12, the shaft 16, the stop pin 18 and the external bypass arrangement. The torsion spring 20 leaves the operating lever 12, the limiting pin 14 and the shaft 16 attached to it in one direction opposite turn clockwise (with respect to FIG. 1), which means that the restriction pin 14 is in the flow-through position is held.

Fig. 3 shows a cross section along the line 3-3 of Fig. 2. The shaft 16 is connected to an eccentric disk 24, which has a surface 26 on one side.

The disc 24 has the task of a bypass actuator,

3-330

-330712

in that the surface 26 moves the piston 28. The disc 24 is in a bypass position when the surface 26 against pushes the piston 28 and in a flow-through position when the surface 26 of the disc 24 is rotated away from the piston 28 by 180 °. The spring-loaded piston 28 serves as a pressure gauge for the lubricating oil and measures the oil pressure of the machine via the oil inlet point 40 and the oil outlet point 42.

With the exception of the outer bypass cap 3OC, these parts of the present invention discussed above operate in FIG same manner as the comparable parts in the patent cited above. When the operating lever 12 in Is rotated clockwise and occupies the position shown in FIG. 1, the disc 24 causes the spring-loaded Piston 28 to bring about a bypass position. As can be seen from FIG. 3, the surface side 26 of the eccentric disk is located 24 now opposite the piston 28. However, as soon as the lubricating oil pressure the force of the piston spring 51 is sufficient greatly exceeds, the disk 24 is free and moves relative to the piston 28. As shown in FIG. 3, causes then the torsion spring 20 rotates the shaft 16 and the disk 24 attached to it through an angle of 180 ° away from the piston. In other words, the disk 24, the shaft 16, the limiting pin 14 and the Operating lever 12 independently in a state of motion. This automatic reset is extremely desirable because there is no further need for an engine protection device to stop the fuel flow or as soon as the oil pressure has reached a safe value.

Bypass fuse

With reference to the illustration in Fig. 3, but also taking into account the exploded view in Fig. 5,

the essence of the bypass fuse of the present invention will now be explained. It should be reminded again are »that an irresponsible user who uses one of the previous machine protective devices that Bypass device can go over. So such a user can switch the bypass device, the machine drive many kilometers, thereby causing expensive machine damage. Because the bypass device is so constructed is that it is possible for a machine operator to move his car or his. Machine to a harmless one Bringing place, this bypass bypass represents a particular nuisance for the machine owner. It however, there was nothing in the earlier devices to discourage the irresponsible user. could, just that To turn operating lever 12 by 180 ° counterclockwise from the position shown in Fig. 1, after which the user could simply deny entering the bypass device intervened to hub.

In order to prevent such abuse of the bypass device that the user can simply deny being in the Having engaged the bypass device, the disc 24 of the present invention has been significantly compared to that of the bypass device previous design improved. In particular, the Washer 24 has a bore 43 which extends along ^ the diameter of the Disk 24 extends to about the center of the surface. At this end of the bore 43, which extends through the surface 26 extends therethrough, there is an annular region 45 Shaft 16 has a bore that runs concurrently with bore 43. A spring piston 44 is in the bore 43 of the side of the bore 43 placed opposite the surface 26. The annular region 45 holds the spring piston 44 in the bore 43 against the force of itself

behind the spring piston 44 located spring 48. A screw spindle 50 is used to close the surface opposite side of the bore 43 is used. Additionally the screw spindle 50 can serve as a clamping screw for fastening the disk 24 to the shaft 16.

Referring to Fig. 3, the piston 28 differs from the previous pistons in that it has a receiving opening 46 which cooperates with the spring piston 44. As can be seen from this figure, there is the disk 24 in a bypass position, wherein the Spring piston 44 is located in the receiving opening 46 of the piston 28. Accordingly, the disk 24 is in the bypass position secured, so that a thoughtless machine user is prevented from the operating lever 12 in the By turning back! To position. At the same time is the automatic reset device described earlier full operational. When the oil pressure the piston 28 to the left has moved with respect to Fig. 3, the spring piston 44 leaves the receiving opening 46, now the torsion spring Spring washer 24 can automatically reset in substantially the same manner as in the above patent. Unless there is enough oil pressure to reset the disk 24, the lift remains! 12 secured in the bypass position, which shows the machine owner that the user has the Has not bypassed the bypass device.

Main valve and bypass valve

Referring to Figures 3, 4 and 6, the main valve and bypass valve of the present invention will be detailed described. The push rod 52, which is used to adjust the main valve, is attached to the piston 28 and extends axially along the cylindrical bore 54. A

Coil spring 51 surrounds the push rod 52 between the Piston 28 and the annular part 56, the piston being braced to the right (as shown in FIG. 3).

A cylindrical bore 58 of the master cylinder runs coaxially to the bore 54, this bore being separated from the bore 54 by the annular part 56. The bore 58 of the main valve is located in part between the fuel inlet point 60 and the associated fuel chamber 61 on the one hand and the fuel outlet point 62 on the other side. In the bore 58 of the main valve there is an elongated main valve part 70 which is normally closed by means of an O-ring 72 which is pressed against the annular valve seat 74 by the main valve spring 76. The main valve part 70 contains grooves or grooves 78 which run axially along the substantially cylindrical main valve part 70, each of these axially running grooves 78 lying between two adjacent radially protruding parts 80. The axial grooves and the associated radial parts 80 extend from a disk-shaped part 82 to a cylindrical part 86 (best seen in FIG. 6). The radially projecting portions 88 are coaxially located _to ^ _6n corresponding projecting parts 80. Between the disc 82 and the outer plate 84 of the O-ring 72. The outer washer 84 cooperates with the O-ring 72 and the valve seat 74 annular as a , fuel blocking part. The fuel inlet end of the main valve part 70 includes a screw spindle receiving head part 89 that is located in the fuel inlet chamber 61. An axial bore 90 runs along the axes of the main valve 70.35

ι
If desired, a structure slightly different from that shown in the figures can be used for the annular member 84 and the O-ring 72. In particular, the O-ring 72 can be formed at the same time as the aluminum required for the main valve 70 and / or glued to part 70 in order to ensure a secure seal between these parts. Furthermore, the ring-shaped part 84, the O-ring 72 and the valve seat 74 can be designed in such a way that a metal-to-metal contact is formed between them when the spring 76 presses the part 74 against the valve seat 77 with a force greater than the intended force. » This alternate construction may be desirable in order to effectively seal the O-ring 72 in response to the force of the spring 76.

The bypass valve parts located essentially in the main valve 70 will now be described with reference to FIGS. 3, 6 and Fig. 7, which is an enlarged partial illustration FIG. 14 shows a cross-sectional view of parts within the main valve 70. One located in the axial bore 90 located bypass tappet rod 98 extends out of the main valve 70 and contacts the tappet rod 52. A bypass ball valve 96 which is the opposite Touches the end of the bypass plunger rod 98, is against the bypass plunger rod 98 through the bypass or a ball valve spring located in the main valve 70 94 printed. The push rod 98 is against being pushed out from one end of the main valve 70 secured by the fact that the annular groove 99R of the The retaining ring 99 located on the bypass plunger rod 98 and the inwardly extending annular closure 99S • the bore 58 cooperate. The one formed with an axial opening 93 (coaxial to the axial bore 90) Screw spindle 92 is with the head part 89 of the main valve part 70 in threaded connection, whereby the Bypass spring 94, the bypass ball valve 96 and the bypass plunger - Rod 98 must be secured in hole 90.

-U-.: ..-.: - ^r - ^rr - ^: 3-33-ü ^r 712 -

The operation of the main valve 70 and the with it interacting parts will now be explained with reference to Figures 3, 4, 6 and 7 when the operating lever 12 is in the normal flow position. Not enough Oil pressure on the piston 28 holding onto it Measuring spring of the lubricating oil pressure acts, lets the main valve spring 76 press against the. Hauptventi1 70 such that the O-ring 72 is pressed sealingly against valve seat 74, as shown in Fig. 3 I. This cuts off any fuel— flow from the fuel inlet point 60 to the fuel outlet point 62 via the flow path in the fuel chamber 61 and the part of the bore 58 to the left (Fig. 3) of the Fuel outlet point 62. In addition to the main valve closed in FIG. 3, the bypass valve 96 is like can be seen from Fig. 7, closed as long as the control lever 12 is in the throughput position. .In this transitory position the surface 26 of the disk 24 is rotated 180 ° away from the piston 28. The bypass plunger rod 98 is located in its extreme right position, as can be seen from Fig. 7, the retaining ring 99 directly rests against the inwardly extending annular connector 99S of the bore 90. As a result, the bypass valve becomes 96 through, the bypass or ball valve 1 spring 94 aegen ' the ring-shaped .Kuael venti 1 s i tz 96Sgedrlickt. If the Valve ball 96 sealing against ball valve seat 96S is printed, no fuel flows from the fuel inlet point 60 to the fuel outlet point 62 via the axial opening 93 (in the screw spindle 92), the axial bore 90 and the throttle outlet 100, of which several in the axial grooves 78 of the main valve part 70 are located (see especially Fig. 6). The throttle outlet openings 100 are in communication with that part of the bore 90 which, as seen in the flow direction, is located behind the valve ball connects. Thus, the fuel flow to the engine is in the . Venti1stel1ung according to FIG. 7 completely prevented.

It can thus be seen that the main event will then take place

* · Copy.

" ^: - ^:: - ^: 3-33-Ö712

is closed when the measuring piston 28 of the lubricating oil pressure indicates that the oil pressure is below a predetermined pressure P1. The plunger rod 52 is used as an adjustment unit of the main valve, which this holds open as long as the oil pressure at the piston is above the pressure P1. Referring back to the bypass protection It should be noted that the spring piston 44 secures the disc 24 until the oil pressure hits the piston 28 moves so far that the spring piston 44 emerges from the opening. This happens at a valve pressure P 2, which is not necessarily the same as P 1, although it is preferably of this order of magnitude.

To allow the motor to stall by allowing a limited flow To prevent the amount of fuel, the bypass lever 12 is turned 180 ° clockwise into a position as shown in Fig. 1. During this rotation, the disk 24 also rotates by 180 °, so that the surface 26 now comes into contact with the end face of the piston 28, as shown in FIG. 3. When rotating the disc 24 moves the piston 28 to the left (according to FIG. 3), so that the plunger rod 52 is the bypass plunger rod 98 shifts to the left. Shifting the bypass plunger rod 98 to the left and away from the volumetric flask 28 of the lubricating oil pressure causes the valve ball

96 to the left and away from the valve 1 ball seat 96S is moved. Accordingly, a small or limited amount of fuel now flows from the fuel inlet point 60 to the fuel outlet point 62 via the axial Opening or inner bore 93, the axial bore 90

and the throttle exhaust port 100. Simultaneously the adjustment of the piston 28 caused by the rotation of the disk 24 is not sufficient for the push rod 52: the main valve part 70 according to

moved left. So the O-ring 72 is still seated the main valve 74 as shown in FIG.

As detailed above, the spring piston 44 is held in the receiving opening 46 of the piston 28, whereby it is not possible for the machine user to the disk 24, the shaft 16 and the attached Move lever 12 back to the flow position. After eliminating the too low 'oil pressure, however, the piston 2Γ, from the position shown in FIG. 3 moved to the left, the torsion spring 20 automatically resetting the manually operated bypass lever 12.

In addition, the displacement of the piston 28 to the left causes the plunger rod 52 to move the spring 94 so far compresses until the play of the bypass tappet rod 98 is used, so that the tappet rod 52 is not with the end of the main valve 70 comes into contact.

As a result, the main valve 70 is moved to the left, the main valve being opened by lifting the O-ring 72 off the valve seat 74, as shown in FIG. The fuel can now from the fuel inlet point 60 to the fuel outlet point 62 flow, through the grooves or axial grooves of the main valve 70, the main valve in the open Position for normal machine operation.

In addition to the fact that it is particularly advantageous for the tappet rod 52 and the piston 28 both to be used for the opening the main valve and to open the bypass valve to use, the present embodiment is special advantageous in that the machine owner if insufficient Oil pressure optionally the possibility of a complete machine shutdown or a speed limitation Has. In particular, the arrangement shown in Fig. 3 can easily be incorporated into a speed-limiting safety device by first unscrewing the end cap 102. Now the screw spindle 92 from the main valve part 70 removed.

4a-

The bypass plunger rod 98, the bypass valve ball 96 and the spring 94 can now be removed from the axial bore 90 in the main valve part 70. The screw spindle 92 and the final cap 102 can now be screwed back into their predetermined positions with the spring 76 against the main valve 70 presses, which performs its usual function as a main valve and at the same time a speed limiter or a limited flow of fuel through the opening 93, the axial bore 90 and the throttle outlet opening 100 causes.

Although the option to use the device to full Use fuel shut-off or to limit engine speed the patent 3,590,798 comes close, sees the present invention suggests this option in conjunction with protective devices disclosed in that prior patent are not to be realized .Although the present invention is an easy-to-use conversion from a fuel cut-off for speed limitation supplies, the changeover takes place within the fuselage 10. It is therefore less likely that a change was made by the user who does not want to follow the instructions of the machine owner.

Opposite to fuel end cap 102 is located an 01 end cap 104 screwed to the fuselage 10. In addition, there are O-ring-shaped seals 106 in the safety device in different places. A screw opening 108 (Fig. 3) is provided for a felt filter which allows the chamber 109 to be vented as the piston 28 moves back and forth.

External bypass function

With the aid of FIG. 8, the feature of oversteering will now be shown (override) or bypass valve of the present

Invention explained. In Fig.8 is a side view of the fuselage 10 shown, with a partially broken open Partial view of an externally operated bypass part. In particular, there is the fuel inlet chamber 61 in connection with the bypass fuel channel 110 via an axial opening in the screw spindle 112. The bypass fuel channel 110 extends into an external bypass chamber 114, which is one in the fuel outlet Stel1e 62 extending screw opening 116 (see Fig. 8). The external bypass chamber 114 includes a threaded opening 114T for receipt an external bypass arrangement.

On the pneumatic bypass arrangement 30P, which works as a bypass valve, threads 32P are attached in order to engage in the thread 114T of the external bypass chamber 114. A spring 36 normally presses the rod 35 and the piston 38 attached to it downwards, so that the valve part 37P of the rod 35 normally prevents any fuel flow which could otherwise flow through the opening 116. However, when there is pressure on the pneumatic bypass arrangement 3OP via the pneumatic control line 34P from the pressure source 33P via a tip or touch valve _{31P W1} - _rc j of _the piston

• 25 38 and the valve part 37P moved upwards so that the Fuel completely from bypass fuel passage 110 through opening 116 and into the fuel outlet chamber 62 can flow.

As an alternative embodiment, the valve can overflow bypass arrangement of the present invention be designed as an electrical bypass arrangement 30E, which has a thread 32E for screwing into the thread 114 T. A control line or lines 34E run from the electrical bypass arrangement 30E to an external electrical switch 31E.

r copy

-3Ί- ■ "'" · ■ 3-J3-G712

The electrical bypass arrangement 30E and the spindle 116S are screwed into the opening 116 in order to achieve a firm valve seat. The electrical bypass arrangement 30E is actuated via a conventional solenoid which closes or opens the opening in the spindle 116S 'through the valve part 37E. The electrical bypass 37E preferably consists of a normally closed solenoid valve, so that the bypass 37E blocks the flow of fuel through the bypass fuel channel 116 in the absence of an electrical signal via the electrical line 34E.

The external bypass assemblies are 3OP and 3OE particularly useful in starting a machine incorporating the present safety device. A short one Looking at Fig. 3 shows that the O-ring 72 of the Main valve presses against seat 74 when there is insufficient oil pressure to properly operate piston 28 to adjust. It is not a problem for many machines, as there is enough fuel after the main valve 70 is to enable a start, whereupon the oil pressure builds up quickly to open the main valve 70. For some machines, however, the oil pressure does not build up quickly enough to allow the valve part to open properly 70 to reach. To enable the machine to start until the oil pressure to open the valve part is large enough, the external bypass is consequently actuated.

In order to keep the possibility of misuse of the external bypass low, the pressure valve is the Bypass arrangement 3OP vorzugswei se, i.e. controlled by a spring-loaded touch valve 31P on the dashboard. Likewise the electrical bypass solenoid valve assembly 3OE is activated by a spring-loaded push button 31 E on the dashboard. Accordingly is the

-31- ■ '■' ■ - ■ "-" - · 3-2T3GF712

ι
external bypass of this embodiment only in operation as long as the machine user presses the spring-loaded button, be it the electric or the pneumatic one.

The body 10 of the present fuel control is thereby particularly adaptable that the pneumatic bypass assembly 30 P and the electrical bypass assembly 30E can be exchanged with each other. For a machine with a compressed air starter, the pneumatic bypass arrangement is 3OP preferable. For a machine with which the conventional Type of starting is done via a battery or an electric starter, the present fuel regulator claim an external bypass activity that results from an electrical bypass arrangement 3OE. When a machine owner initially uses his fuel regulator for a pneumatic bypass that can be operated from the outside equipped, he can easily exchange it for an electric one by replacing part 30P with the Part 3OE replaced. The reverse is also easily possible.

Furthermore, at the request of the machine owner, no external bypass can be provided, but a cap 3OC (shown in FIGS. 1 and 2) can be screwed into the chamber 114 instead of the bypass arrangement 3OP and 30E. The cap 3OC simply ensures a complete closure of the opening in the spindle 116S ₉ , the fuel bypass channel 110 always being closed.

COPY

.33- "■" '"" "" ■ 3-33-GT712

Independent, external bypass

An improved ₅ external bypass is described with reference to FIGS. The control of the bypass actuation works together with the pneumatic bypass device 30P, which was explained above with reference to FIG. 8, but is also contained in the side view of FIG. As in the pneumatic control system of FIG. 8, the pneumatic regulator of FIG. 9 uses a pressurized control line 34 P to adjust the piston 38. The piston 38 is fixedly connected to the valve part 37P and has a bypass surface 39 which is responsive to pressure .

The improved, external bypass 202 according to FIGS. 9 and 10 contains a hydraulic cylinder 204 with a threaded sleeve part 206. Union nuts 208 are screwed onto the sleeve 206 to to connect the device 202 to a plate 210 (only shown in Fig. 9). The plate 210, which is partially shown broken away may represent an instrument panel in a diesel vehicle.

A hydraulic piston 212 with a shaft 214 attached to it extends into the hydraulic cylinder 204. A spring 216 pushes the piston 212 and the shaft 214 attached to it out of the plate 212. A push button 218 is attached to one end of the shaft 214 opposite the piston 212.
30th

A bore 220 runs in the shaft 214. An additional locking bolt 222 can be inserted into the bore 220. The locking bolt 222 is provided to cooperate with a locking slot 224 which is located on the threaded neck 206 is located. A connector 226 is used at one end of the hydraulic cylinder 204 to connect it to the pressure

pressurized control line 34 P to connect. A bleed screw 228 is located in the bore 230 of the hydraulic cylinder 204.-j

The operation of the external overflow or bypass. ■ valve controller 202 of Figures 9 and 10 is relatively unchanged. In contrast to the external bypass, the one with a pneumatic pressure source 33 P works in Figure 8, the device 202 used to actuate the piston a hydraulic fluid. Especially the control line 34P and the hydraulic cylinder part including the spring 216 are filled with a hydraulic fluid. brake fluid can be used preferably. Depending on the length j of the control line 34P, a different mixture should be used

! 5 of brake fluid and air can be used. For example, if ί

control line 34P is approximately 16 feet (4.8 m) long, I.

approximately 95% brake fluid and 5 % air should be used j. If the control line is only 1.5 or 1.8 m (5 or 6 feet) long, approximately 2/3 of the brake fluid should be used. By using the combination of brake fluid and air, the manually operated pushbutton 218 can be regulated with regard to its actuation pressure. It can be clearly seen that if the control line and hydraulic cylinder were completely filled with hydraulic fluid, actuation of the push button 218 would be extremely easy due to the relative incompressibility of the hydraulic fluid. On the other hand, if too much air is used, the maximum amount of actuation of the push button 218 would not be sufficient to exert sufficient pressure on the piston 38 to open the bypass or the external bypass valve or overflow valve. The vent screw 228 can be used to regulate the mixing ratio of air and hydraulic fluid as it is.

my over 1 i 'is.

When button 218 is pushed, the hydraulic piston pushes

ι
212 compresses the spring 216 and applies pressure to the control fluid, which consists of air and hydraulic fluid, within the control line 34P. The compression of this liquid creates pressure on the piston 38 via its pressure-responsive surface 39. The piston 38 compresses the spring 36 and displaces the valve part 37P so that the bypass fuel passage 110 (only visible in FIG. 8) is opened .

The locking bolt 222 can be used to secure the hand-operated Pushbutton 218 can be held in the depressed position. The locking bolt 222 can be inserted into the locking slot 224 (particularly to be seen in Figs. 11 and 12) and rotated into a locking position (Fig. 12), wherein the bypass fuel passage 110 (FIG. 8) is opened without having to keep pressing button 218.

If the machine owner is concerned that the Machine user drives his Fahrzeua lanae time or the Machine with the external bypass switched on for a long time runs, the locking bolt 222 does not need to be attached. Instead, a smaller one can be used Pin can easily be used to close hole 220. On the other hand, the shaft 214 cannot do anything without Have bore.

It should be noted with reference to FIGS. 3 and 8 that the bypass valve or the external bypass regulator 202 is used to close the bypass fuel passage 110 regulate, which is at least partially outside the boundary surfaces which is the main fuel duct between the fuel inlet point 60 and the fuel off! aß-Stell e 62 form.

_2f- "" "" ■ 3 3 3 Ü 7 1

IiLn important feature of the external bypass or of the bypass valve actuator 202 of FIGS. and 10 is the fact that this only applies to the Internal combustion engine acts when the bypass valve is operated with the valve part 37P. In other words .regulates the push button 218 of the bypass valve actuator 202 does not control any functions of the combustion engine, but only regulates that Valve part 37P- Likewise are the bypass valve with the

in bypass valve part 37P and piston 38 are the only ones Facilities that operate through the use of fluid pressure pressurized control line 3 ^ P regulates. Consequently endangered any leak in the control line 3 ^ P not the vehicle's braking system, as is the case

^ jC would be if the pressurized control line 34p to fluid from the vehicle's braking system would have to fall back.

An advantageous feature of the external bypass device 3OP (FIGS. 8 and 9) and the bypass device 30E (FIG. 8) is that they are detachably attached to the main body 10 of the present device. As a result, they can optionally be incorporated into any system. At the same time, they do not take up any space in the main body if they are not needed for a particular use. In contrast, the cap 3OC is simply screwed on in its place _f, as can be seen in FIG. 1.

- blank page -

Claims (21)

Patent Attorneys .. _ - HANSMANN- & VÖGESER: APPROVED REPRESENTATIVES AT THE EUROPEAN PATENT OFFICE EUROPEAN PATENT ATTORNEYS Patent Attorneys Hansmann & Vogeser Albert-Roßhaupter-Str. 65, D-8000 Munich 70 SENTINEL MANUFACTURING COMPANY, INC. P.O. Box 15291 Denver, Colorado 80215 V.St. A. Dipl.-Ing. Martin Licht (1926-1981) t Dr. Reinhold Schmidt (1932 - 1982) Dipl.-Wirtsch.-Ing. Axel Hansmann Dipl.-Ing. Werner Vogeser Dipl.-Chem. Dr. rer. nat. Ilse Ruch Albert-Roßhaupter-Strasse 65 D-8000 Munich 70 Telephone: (089) 7603091 Telex: 5212284 pats d Telegrams: Lipatli Munich Munich, August 25, 1983 WiI "Device for regulating the fuel flow" PATENT CLAIMS 1. / Device for regulating the fuel flow rate in a fuel delivery line of an internal combustion engine as a function of the pressure in the machine's lubricating oil system, marked by a) a fuselage (10) with a main fuel terminal (58.61); b) a fuel inlet chamber (60) and a Fuel outlet chamber (62), each of these chambers in communication with the main fuel channel and which with the fuel delivery line of the internal combustion engine are connected; c) a lubricating oil pressure measuring device (28) for receiving the pressure in the lubricating oil system of the machine; d) a main valve (70) in the main fuel channel sum Regulating the normal fuel flow between the fuel inlet chamber and the fuel outlet chamber, with the main valve closing, when the lubricating oil measuring device indicates that ι the pressure in the lubricating oil system of the machine COPY Bayerische Vereinsbank Munich, Account No. 882495 (BLZ 700 202 70) - Deutsche Bank Munich, Account No. 82/08050 (bank code 700 700 10) ...... h. ^ nmi Miinrhen Account No. 163397 - 802 (BLZ 700 100 80) is below a predetermined value Pl; e) a bypass fuel channel (110) in the main valve which bypasses the amount of the main fuel channel regulated by the main valve and which allows a predetermined, limited amount of fuel ₃ to flow from the fuel inlet chamber to the fuel outlet chamber. f) a normally closed bypass valve (37P), the bypass fuel channel being interrupted is; and g) a bypass valve adjusting element (202) located outside the main valve for regulation the bypass valve by means of a pressurized fluid control line (34P); and wherein the bypass fuel line is at least partially outside of the main fuel channel forming housing is located, and wherein the bypass valve adjusting member is a spring-loaded Adjusting piston (212) which pressurizes the fluid in the control line can set, and wherein the bypass valve is actuated by means of a spring-loaded bypass piston (38) which is located at least partially outside of the fuselage and wherein the adjusting piston can open the bypass valve by adjusting the bypass piston. 2. Apparatus according to claim 1, characterized by a bypass operating lever (12). at least partially extends out of the fuselage and is attached to it and optionally in a shut-off position or can be brought into a bypass position, the bypass position allowing fuel flow from the Fuel inlet chamber to fuel outlet chamber allows even if the pressure in the lubricating oil system ι the machine is below a predetermined value Pl. 3. Device according to claim 1, characterized in that the bypass piston is fixed to the bypass valve connected is. 4. Apparatus according to claim I _5, characterized in that the bypass valve actuating part contains a manually operable push button (218), and that the bypass valve remains open as long as the push button is depressed. 5 _m Device according to one of the preceding claims for regulating the fuel flow in a fuel delivery line of an internal combustion engine as a function of the pressure in the lubricating oil system of the machine, characterized by a) a fuselage (10) with a main fuel channel (58, 61) j b) a fuel inlet chamber (60) and a Fuel outlet chamber (62), each of these chambers being connected to the main fuel channel is in communication and with the fuel delivery line of the internal combustion engine get connected; c) a lubricating oil pressure measuring device (28) for recording the pressure in the lubricating oil system of Machine; d) a main valve (70) in the main fuel channel for regulating the normal fuel flow between the fuel inlet chamber and the Fuel outlet chamber, being the main valve includes when the lube oil meter direction indicates that the pressure in the machine's lubricating oil system is below a predetermined ι Value Pl lies; e) a bypass fuel channel (110) in the main ven til, which diverts the volume of the main fuel channel regulated by the main valve, and which of a predetermined, limited amount of fuel, from the fuel inlet chamber to flow to the fuel outlet chamber. f) a normally closed bypass valve (37P), the bypass fuel channel being interrupted is and g) a bypass valve adjusting element (202) located outside the main valve ■ j_5 for controlling the bypass valve by means of a control line (3 ^ P) provided with pressurized fluid; and wherein the bypass fuel line is at least partially outside of the main fuel channel forming housing is located, and wherein the bypass valve actuator is a manually operable push button (218) and connecting elements (222, 224) whereby the push button is in each position in connection with the open bypass valve stands. 6. Apparatus according to claim 5 _S, characterized in that the push button is attached to a shaft (214) which is partially in the sleeve part (206) and that locking devices are present, which consist of a locking bolt (222) on the shaft and a locking slot (224) exist on the sleeve part for receiving the locking bolt, so that the push button is held in its position. 7. Device according to one of the preceding claims, sayings for regulating the fuel flow in a fuel delivery line of an internal combustion engine depending on the pressure in the machine's lubricating oil system, characterized by a) a fuselage (10) with a main fuel channel (58, 61); b) a fuel inlet chamber (60) and a fuel outlet chamber (52), each of these chambers ^ O communicates with the main fuel duct and which are connected to the fuel delivery line of the internal combustion engine; c) a lubricating oil pressure measuring device (28) for receiving IQ the pressure in the lubricating oil system of the machine; d) a main valve (70) in the main fuel channel for Control of the normal fuel flow between the fuel inlet chamber and the fuel outlet laßkammer, the main valve closes when the lubricating oil meter indicates that the pressure is below a predetermined value Pl in the lubricating oil system of the engine; e) a bypass fuel channel (110) in the main valve, which diverts the amount of the main fuel channel regulated by the main valve, and which one predetermined, limited amount of fuel, from the fuel inlet chamber to the fuel outlet chamber allows to flow; f) a normally closed bypass valve (37P), the bypass fuel passage being interrupted; and
g) a bypass valve adjusting member (202) located outside the main valve for regulating the bypass valve by means of a control line (37P) provided with pressurized fluid, wherein ! the bypass valve adjusting member is a spring-loaded Has adjusting piston (202) which can put the liquid in the control line under pressure, and whereby the bypass valve adjusting element is The internal combustion engine only works by doing the ο The bypass valve is actuated, and the bypass valve is the only mechanism that by means of the pressure acted upon control line is regulated. 8. Apparatus according to claim 7, characterized in that a pressure-receiving surface (39) of the bypass is firmly controlled with the bypass valve, and with the pressurized liquid in the control line Touch stands. 9. Apparatus according to claim 8, characterized in that the bypass valve actuating part is one of Hand-operated push button (218) and that the bypass valve remains open until the push button is depressed. 10. The device according to claim 8, characterized in that the bypass valve actuating part is one of Includes hand-operated push button (218) and locking elements (222, 224) with the push button in a position that is the open position of the bypass valve. 11. The device according to claim 1, characterized draws that the pressurized area of the bypass is outside the main hull. 12. Device for regulating the fuel flow in a fuel delivery line of an internal combustion engine as a function of the pressure in the machine's lubricating oil system, characterized by a) a body (10) with a main fuel channel (58j 61); b) a fuel inlet chamber (60) and a fuel outlet chamber (62), each of these chambers being in communication with the main fuel passage and which are connected to the fuel delivery line of the internal combustion engine; c) a lubricating oil pressure measuring device (28) for receiving the pressure in the lubricating oil system of the machine; IQ ' d) a main valve (70) in the main fuel passage for regulating the normal fuel flow between the fuel inlet chamber and the fuel outlet chamber, the main valve closing when the lubricating oil measuring device indicates that the Jg Pressure in the machine's lubricating oil system under one predetermined value Pl; e) a bypass fuel channel (110) in the main valve, which bypasses the amount of the main fuel passage regulated by the main valve, and which one predetermined, limited amount of fuel from the Fuel inlet chamber to fuel outlet chamber allows to flow; f) a normally closed bypass valve (37P) , the bypass fuel passage being interrupted; and g) a QQ bypass valve adjusting element (202) located outside the main valve for regulating the bypass valve by means of a control line (37P) provided with pressurized fluid; and a bypass valve which is part of the detachable bypass assembly (30P) and is detachably attached to the fuselage and having a portion outside of the fuselage, and wherein the bypass valve adjustment member has a manually operable push button (218) and connecting elements (222.224) on- 8 - · "" - "" - "'3350712 has, whereby the push button in every position with communicates with the open bypass valve. 13. Apparatus according to claim 12, characterized in that that a pressure-receiving surface (39) of the bypass is firmly controlled by the bypass valve and is in contact with the pressurized fluid in the control line. 14. The device according to claim 12, characterized by a bypass operating lever (12), which at least partially extends from and attached to the fuselage and optionally in a Shut-off position or in a bypass position , _ can be brought, with the bypass position a Ib Fuel flow from the fuel inlet chamber to the Fuel discharge chamber allows even if the pressure in the machine's lubricating oil system is below one predetermined value Pl lies. 15. The device according to claim 14, characterized by a bypass lock (44, 46) to prevent the bypass adjustment unit from moving from the bypass position switches to the flow position when the pressure in the machine's lubricating oil system falls below a predetermined value (P2). 16. Device for regulating the fuel flow in a fuel delivery line of a OQ internal combustion engine as a function of the pressure in the machine's lubricating oil system, characterized by a) a fuselage (10) with a main fuel channel (58, 61); b) a fuel inlet chamber (60) and an “f. Fuel outlet chamber (62). being each of these Chambers with the main fuel channel in connection and which are connected to the fuel delivery line of the internal combustion engine; c) a lubricating oil pressure measuring device (28) for receiving the pressure in the lubricating oil system of the machine; d) a main valve (70) in the main fuel channel for c regulating normal fuel flow between the fuel inlet chamber and the Fuel outlet chamber, being the main valve closes when the lubricating oil measuring device indicates that the pressure in the lubricating oil system of the Machine is below a predetermined value Pl, wherein the main valve is an elongated, movable Has valve part (70) which is tensioned by the valve spring (76) and normally closed is, with a bore in the main valve part .p. (90) is located, its inlet opening in communication with the fuel inlet chamber and an outlet opening (100) in communication with the fuel outlet chamber, so that the fuel can flow through this bore from the fuel inlet chamber to the fuel outlet chamber; e) a bypass pushrod (98) extending at least partially located in the bore; 2g f) a bypass adjusting lever (12), which can optionally can be brought into a bypass and flow-through position, the bypass position enabling that fuel can flow into the fuel delivery line of the engine, even if the pressure is below a predetermined value Pl in the lubricating oil system of the engine; and wherein the operating lever can be brought into a bypass position, thereby removing the fuel from the bore inlet point can flow to the bore outlet point by removing the bypass push rod from the lubricating oil pressure actuator is moved away, and g) a bypass fuel channel (110) in the fuselage, which diverts the amount of fuel channel that is regulated via the main valve, and allows a predetermined, limited amount of fuel from the fuel inlet chamber to the powerful substance outlet chamber can flow; h) a normally closed bypass valve (37P), which optionally connects the bypass fuel channel interrupts; i) a bypass valve adjusting element (202) located outside the main valve for regulation of the bypass valve by means of a pressurized fluid control line (34P); and j) a pressure-absorbing surface (39) of the bypass, which is permanently connected to the bypass valve and is in contact with the pressurized fluid in the control line; and where the bypass valve adjusting member has a spring-loaded adjusting piston (212), which the Can put fluid in the control line under pressure. 17. The device according to claim 16, characterized in that the bypass operating lever on the Is attached to the fuselage and at least partially extends therefrom. 18. The device according to claim 16, characterized in that a spring-loaded valve ball (96) located in the main valve part, whereby this spring-loaded valve ball can optionally block the bore. 19. Device for regulating the fuel flow in a fuel delivery line of an internal combustion engine depending on the pressure in the machine's lubricating oil system, characterized by a) a fuselage (10) with a main fuel channel (58, 61); b) a fuel inlet chamber (60) and a powerful substance outlet chamber (62), each of these chambers is in communication with the main fuel channel, and which is connected to the fuel delivery line of the Internal combustion engine are connected; c) a lubricating oil pressure measuring device (28) for receiving the pressure in the lubricating oil system of the machine; d) a main valve (70) in \ main fuel channel for controlling, when the lubricating oil measuring means indicating the normal fuel flow between de * ¹ power st off-inlet chamber and the fuel outlet chamber, wherein the main valve closes, that the pressure drops below a predetermined value Pl in the lubricating oil system of the machine, the main valve containing an elongated, 'movable valve part (70) which is tensioned via a valve spring (76) and is normally closed, with a bore (90) in the main valve part Inlet port communicates with the fuel outlet chamber and an outlet port (100) in communication with the fuel outlet chamber so that fuel can flow through this bore from the fuel inlet chamber to the fuel outlet chamber; e) a bypass valve located in the bore (96); 12 ■ - "---" 33-07-2 . f) a bypass spring (9 * 0. which is at least partially located in the valve part and presses against the bypass valve; g) a bypass adjusting lever (12), which can optionally be brought into a bypass and through-flow position can, wherein the bypass position allows that fuel in the fuel delivery line of the Motor can flow even if the pressure in the lubricating oil system is below a predetermined value Pl lies; and wherein the operating lever can be brought into a bypass position, whereby the Fuel can flow from the bore inlet point to the bore outlet point by the bypass pushrod is moved away from the lubricating oil pressure operating member, and h) a bypass fuel channel (110) in the fuselage, the that amount of fuel channel diverts that over the main valve is regulated and allows a predetermined, limited amount of fuel from the fuel inlet chamber to the fuel outlet chamber can flow; i) a normally closed bypass valve which selectively interrupts the bypass fuel passage; j) a bypass valve adjusting member (202) located outside the main valve for regulating the Bypass valve by means of a control line provided with pressurized fluid (34p); and wherein the bypass valve member is a Has spring-loaded adjusting piston (212) which pressurizes the fluid in the control line can put. t 20. Apparatus according to claim 19, characterized in that 13 "" "" "" 333Ö712 1 that there is a valve ball in the bore of the bypass valve (96) is located. 21. The device according to claim 19, characterized in that the bypass valve actuator has a manually operable push button (218) and connecting elements {2? A, 222), whereby the push button is brought into its position corresponding to the open bypass valve can be.